_invalid_definition() public method

Die violently. If self::$debug is true, throw an exception.
public _invalid_definition ( string $debug_message = '' ) : void
$debug_message string
return void e.g. return _you_ into a void.
 /**
  * Generates HTML for the term field
  * @access public
  * @param string $html_template THe HTML used to wrap the field
  * @param string $taxonomy
  * @param WP_Term $term
  * @return string The element markup
  */
 public function term_fields($html_template, $taxonomy, $term = null)
 {
     // Make sure the user hasn't specified a field name we can't use
     if (in_array($this->fm->name, $this->reserved_fields)) {
         $this->fm->_invalid_definition(sprintf(__('The field name "%s" is reserved for WordPress on the term form.', 'fieldmanager'), $this->fm->name));
     }
     // Set the data type and ID
     $this->fm->data_type = 'term';
     $this->fm->data_id = is_object($term) ? $term->term_id : null;
     $this->current_taxonomy = $taxonomy;
     // Create the display label if one is set
     if (!empty($this->title)) {
         $label = sprintf('<label for="%s">%s</label>', esc_attr($this->fm->name), esc_html($this->title));
     } else {
         $label = '';
     }
     $field = $this->render_field(array('echo' => false));
     // Create the markup and return it
     return sprintf($html_template, $label, $field);
 }